<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <!-- 按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
        </el-col>
      </el-row>
      <!-- 表格 -->
      <tree-table
        class="treeeTable"
        :data="cateList"
        :columns="columns"
        :show-index="true"
        index-text="#"
        border
        :expand-type="false"
        :selection-type="false"
      >
        <!-- 是否有效 -->
        <template slot="isok" slot-scope="scope">
          <i
            class="el-icon-success"
            v-if="scope.row.cat_deleted === false"
            style="color: lightgreen;"
          ></i>
          <i class="el-icon-error" v-else style="color: red;"></i>
        </template>
        <!-- 排序 -->
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag size="mini" type="success" v-else-if="scope.row.cat_level === 1">二级</el-tag>
          <el-tag size="mini" type="warning" v-else>三级</el-tag>
        </template>
        <!-- 操作 -->
        <template slot="option" >
          <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
        </template>
      </tree-table>
      <!-- 分页 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[1, 200, 5, 10]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      ></el-pagination>
    </el-card>
    <!-- Dialog -->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%"
      @close="addCateDialogClosed"
    >
      <el-form
        :model="addCateForm"
        :rules="addCateFormRules"
        ref="addCateFormRef"
        label-width="100px"
      >
        <el-form-item label="分类名称：" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类：">
          <!-- options 父级数据源 v-model 选中暂存 props 设置显示属性 -->
          <el-cascader
            :options="parentCateList"
            v-model="selectedKeys"
            :props="cascaderProps"
            @change="parentCateChanged"
            clearable
            change-on-select
          ></el-cascader>
        </el-form-item>
      </el-form>
      <!-- 按钮区 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCata">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 请求数据
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      // 商品列表
      cateList: [],
      // 总数据条数
      total: 0,
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name'
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isok'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'option'
        }
      ],
      addCateDialogVisible: false,
      // 添加分类input绑定的内容,要提交请求的数据
      addCateForm: {
        // 默认自己是根
        cat_pid: 0,
        // 默认一级
        cat_level: 0,
        cat_name: ''
      },
      //验证规则
      addCateFormRules: {
        cat_name: [{ required: true, message: '请输分类名称', trigger: 'blur' }]
      },
      // 请求获取数据暂存区
      parentCateList: [],
      // 级联选择器属性
      cascaderProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      // 选中的父级分类
      selectedKeys: []
    }
  },
  methods: {
    addCata() {
      // console.log('请求数据：', this.addCateForm)
      this.$refs.addCateFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(
          `categories`,
          this.addCateForm
        )
        if (res.meta.status !== 201) {
          return this.$message.error(`${res.meta.msg}`)
        }
        this.$message.success(`${res.meta.msg}`)
        this.getGoodsList()
        this.addCateDialogVisible = false
      })
    },
    // 级联选择器--选中改变事件
    parentCateChanged() {
      console.log(this.selectedKeys)
      // if (this.selectedKeys.length > 0) {
      this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length - 1]
      this.addCateForm.cat_level = this.selectedKeys.length
      //   return
      // } else {
      //   this.addCateForm.cat_pid = 0, this.addCateForm.cat_level = 0
      // }
    },
    // 添加分类 -Dialog关闭事件
    addCateDialogClosed() {
      this.$refs.addCateFormRef.resetFields()
      // 清空选择
      this.selectedKeys = []
      ;(this.addCateForm.cat_pid = 0), (this.addCateForm.cat_level = 0)
    },
    // 获取 Dialog-父级分类-数据列表
    async getParentCateList() {
      const { data: res } = await this.$http.get(`categories`, {
        params: { type: 2 }
      })
      console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error(`${res.meta.msg}`)
      }
      this.parentCateList = res.data
      this.$message.success(`${res.meta.msg}`)
    },
    // 点击添加分类按钮时
    showAddCateDialog() {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage
      this.getGoodsList()
    },
    // 表格数据获取
    async getGoodsList() {
      const { data: res } = await this.$http.get(`categories`, {
        params: this.queryInfo
      })
      console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error(`${res.meta.msg}`)
      }
      this.cateList = res.data.result
      this.total = res.data.total
      // console.log(this.cateList);
      this.$message.success(`${res.meta.msg}`)
    }
  },
  created() {
    this.getGoodsList()
  }
}
</script>

<style>
.treeeTable {
  margin-top: 15px;
}
.el-cascader {
  width: 100%;
}
</style>